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CHAPTER
4
Basic Syntax
You have seen a basic structure of Pascal program, so it will be easy to understand other
basic building blocks of the Pascal programming language.
This section shows the basic syntax of Pascal program.
Variables
A
variable definition is put in a block beginning with a var keyword, followed by
definitions of the variables as follows:
var
A_Variable, B_Variable ... : Variable_Type;
Pascal variables are declared outside the code-body of the function which means they are
not declared within the begin and end pairs, but they are declared after the definition of
the procedure/function and before the begin keyword. For global variables, they are
defined after the program header.
Functions/Procedures
In Pascal, a procedure is set of instructions to be executed, with no return value and a
function is a procedure with a return value. The definition of function/procedures will be
as follows:
Function Func_Name(params...) : Return_Value;
Procedure Proc_Name(params...);
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